Weighing mechanism



Aug. 14, 192s l 1,680,579 A J. B. v vATLlNG WEIGHING uEcHANIs'l Filed Aug. 4 1923' s sheets-shed 1 ZIJ/9] J3 Aug. 14, 1928. 1,680,579

- J. B. wA'rLlNG WEIGHING MECHANISI Filed Aug. 4, 1923 5 Sheets-Sheet 2 y ma 5,2% lg www@ Aug. 14,1928.

` J. B. WATLING WEIGHING MECHANISH Filed Aug. 4, 1923 3 Sheets-.Sheet 3 Patented Aug. 14, 1928.

UNITED STATES JOHN B. WATLING, 0F CHICAGO, ILLINOIS.

` WEIGHING MECHANISM.

Application filed August 4, 1923.

This invention relates to weighing scales but more particularly to the coin-controlled type and has for its principal objects to provide a dependable `mechanism which will `eifectually prevent the weighing of more than one person` for a single coin; to arrange the indicating mechanism so that it plainly shows that the machine is not weighing when an attempt is made to secure an extra weighing without depositing another coin; and to eliminate any possibility of-injury or dann age to the weighing mechanism through rough usage and abuse in attempting to secure free weighing. A

Scales of this type are generally located in public places without protection and are subject to considerable abuse particularly through attempts to cheat the machine by securing the weights of several persons Without depositing additional coins. In some machines of this character, adequate safeguards against such unauthorized use are not provided and it is possible to obtain the Weights of several persons for one coin by merely maintaining some Weight upon the platform between weighing operations.

This, of course, results in loss of revenue to the proprietor of the machine. In other machines a checking or retarding device is arranged to act upon the weight indicating mechanism so that it does not operate freely when anotherweighing is attempted without depositing another coin, but'such devices show a change in weight, which, although inaccurate, may sometime be taken as accurate or as indicating that the scaleV does not weigh correctly,` and thus result in loss of revenue.

Vith my invention, any attempt to obtain an extra weighing without depositing another coin results in a setting of the mechanism substantially at the weight which has been properly obtained, and the mechanism remains in this condition until allweight is rremoved, when the mechanism returns to normal or zero position. Thus it is not only impossible to cheat the machine and obtain another weighing but moreover, as no sub# stantial change occurs in the weight just obtained, it will be apparent to the operator that it is necessary to insert another coin to obtain another Weighing.

The many other-objects and advantages of myimproved weighing scale will be better appreciated by reference to the `following specification when considered in connection Serial No. 655,574.

with the accompanying drawings illustrat, ing a selected embodiment thereof, in which 1 i Fig. 1 is a vertical section on the line 1--1 of Fig. 3 showing in rear elevation the weighing mechanism and safety device forming the present invention, the parts being in their normal or zero position. p

Fig. 2 is the same as Fig. 1 but with the parts inweighing position.

Fig. 3 lis a vertical section on theline 3--3 of Fig. 1.

Fig. 4 is a vertical section on theline`4-4 of Fig. 2. i

Fig. 5 is al detail rear elevation of a portion of the mechanism illustratingthe operation of the safety mechanism, and f Fig. 6 is a detail rear elevation of a portion of the weighing mechanism. j y

Referring tothe drawings, my improved Weighing scale comprises the usual casing l10, dial l1, indicating pointer 12 and weighing platform (not shown). Acoin slot 13 j communicates with a coin chute composed of spaced upper and lower sections 14 and 15 respectively. Parallel frame members e 16 and 17 have Vtheir ends supported byadjustable brackets 18 on the opposite side walls of the casing V10. These members, which are secured together by. bolts 19 adjacent their ends, from the supports fort-he weighing mechanism. The pointei` 12 is mounted on the revoluble shaft 2O supported by' the frame members 16 and 17 A rod 21 has its lower extremity connected to the Weighing platform in the usual manf ner. The upper extremity of this rod Sis supported by a yoke 22 which is connected by bolts 23 to the lower extremities of the weighing springs 24. One of these springs 24 is suspended from the :frame member- 16 and the other from the member 17.` A rod v25 is pivotally connected at its upper end by an adjustable turnbuckle 25 toV a pin 81 which is adjustable along andadapted to be locked at anydesiredrpoint `in the slot 82 of the arm 26 of the bell crank 27 which latter'is supported by a lstud shaft 28 projecting rearwardly from the frame member` 16. The lower portion of this rod projects loosely through an aperture 29 in the yoke. 22 and is formed with a shoulder 31 to en gage the upper face of the yol'reand'limit the downward movement `of the rod in the aperture 29. A, Weight is secured upon the rod 25 above the yoke. A segmental gear 33 is formed on the outer end of the arm 32 of the "bell crank 27. rl`his gear meshes with a pinion 34 free upon lthe shaft 20. A flange 35 is formed on the periphery of this gear at its front end and a lug 36 projects radially from this flange to engage a pin 37 in the rear face of thefpulley 38 which latter is keyed upon the shat't 20. A toothed disk 38 is secured to the :trent face ot this pulley 38. The pulley 3S is provided with a peripheral groove to receive a chain S9. The inner end of this chain is secured to the pulley and a weight 40 is suspended at the outer end thereof in a tubular guide 4l which is attached at its upper end to the frame 1G'. j

-A'loeking lever 42 is pivotally mounted at 43 on the frame member 1G. One extremity 44 of this lever is turned forwardly beneath the trip lever 45 pivotedv on the frame member l1G1at 4G. The'opposite extremity 47 of the lever 42 normally rests on the adjustable pin 48 carried by the upper portion of a vertically slidable plate 49. A weight 50 is adapted `to normally depress the lextremity 47 of the lever 42 'and retain it upon the pin 48. The plate 49 is supported and guided by screws 51 and 52 seated in the `frame member 1G and passing through longitudinal slots `inr the plate. The lower end of the plate 49 yis connected to the yoke 22 bywa link 53A so that vertical movcment'ofthis yoke causes a corresponding movement of the plate;y A rock arm 54 is pivotally connected at 55 to the frame member 1G and a dog 56 is pivoted on an extension 57 ofthis arm between stops 58 and 59. f The pivotal connectionof this arm 54 is located "at one' side of the cent-er of gravity so that the upper portion of the arm normally tends to swing away from theplate 49, causing the dog 56 to press against the edge of this plate. The edge of ythe plate 49 con tacting with this dog has its upper portion 49 cutaway and serrated. The edge portion 60 between the upper and lower parts ofthe plate forms a cam 'face te force the do;r 5G outwardly and the upper portion of the arm 54 inwardly as the plate moves upwardly-in the manner which will be described more fully hereinafter.V A vstop G1 is provided vto limitthe movement of the arm 54. i

The trip lever 45 is provided at oneend with aeoin holder orpoekct 62 which normallylits over thelower end of the upper` port-ion 14 of the coin chute. A coin descending in this portion of the chute lodA es temporarily in this pocket and `depresses the pocketed end of the trip lever into the position indicated in dotted lines inV Fig. 2 where the coin is emptied into the lower portion 15 ot the chute. A weight (3f-3 on the opposite end of the lever 45 causes the pocket end to be'raised assoon as the coin is dis- Charged. An adjustable stop (34 is mounted on the lever 45 near itsv weighted end and has a pin (l5 projecting rearwardly therefrom beyond the arm 54. The downward movement of the poeketed end oi the lever 45 depresses the end 44 of the locking lever 42. lifting the locking dog GG on this lever 42 out of engagement with the .stop (3T at the periphery of the toothed disk 38. A locking dog G8 is pivotally connected to the trame 16 at (59 and an operating arm T() en the extension oi" this dog is eouneetml by a chain 71 with a lug 72 on the. trip lever Al5. This doe is normally in engagement with the toothed periphery of the disk 3S and is moved out of engagement therewith by dcpression ot' the poeketed end ol the lever 45. The stop (37 is ol'l'set somewhat at the front. of the disk 38 sothat it clears the dog (38.

The shaft 2() is held against axial displacement in the bearings of the frame inembers 1G and 17 by a plate 72 which is secured to the frame member 17 by the screw 73 and has a .slot at the upper end engaginLr in an annular groove 74 ai the rear end ot the .sha'tt 20. For the purpose of checking the return movement ol'lhe .sbai 2() and holding the. indicator l2 at Zero position. a pin 75 projects radially from the rear end ot the shaft 20 and engages with an ontturned projection 7G on the inner end ot the lever 77 which is pivoted at 78 to the reai frame member 17. The outer end ot this lever 77 is confined between the upper and lower pins 79 and 8() respectively which allow sufficient movement ot the lever 7T so that the shaft 2O may make a eomplete revolution.

In the operation of the mechanism, the person desiring to be weighed steps upon the weighing platform before depositing a coin. This .causes the platform.y the yoke 22 and the plate 49 to be depressed and the .springs 24 to be extended a distance depeniiling,r on the weight of the person. The indicating! mechanism remains locked and inoperative until the coin is inserted. The insertion of the coin causes the trip 45 to diseugage the dog 6G from the stop G7 and the flog (3H from the teeth of the disk 38. The weight 3() now causes the segmental gear 3? to rotate the pinion 34 in a counteraloekwise direction, viewing the mechanism from the rear. The downward movement of this weight is halted by the stop shoulder #l1 coming in Contact with tbe yoke 22 so that the extent of this movement depends on the weight ot the person. The rotation ot the pinion 34 causes a corresponding rotation of the pulley 3S, the toothed disk 3S and the pointer 12, due to the engagement of the lug 36 with the pin 37. Assuming the yoke v22 to have been depressed as shown in F ig. 2. the indicating parts will come to rest in the position there shown. A greater de- Ulu lli;

pression of the yoke will cause `a correspondingly greater rotation of the pointer. The scales. may be adjusted to provide an accurate reading of the pointer by placing a known weight on the platform and adjusting the rodi 25 inthe turnbuckle 25 so that with the shoulder' 3l resting on the yoke, the pointer will indicate the correct weight on the dial. The weight 4 0 is lighter than the weight 30 so that the chain 39 is wound upon the pulley 38 and the weight 4() lifted by the downward movement o? the weight The depression of the yok'e22in the manner described correspondingly jdraws down the plate 49 and brings the dog 56 into engagement with the cut-away portion of this plate, permitting the `upper portion of `the arm 54 to swing ontwardlyintothe position indicated in Fig. 2 and bringing the upper end of this arm into the path of the pin on the trip lever 45.` As soon as the coin has been discharged from the pocket 62, the y weight 63 causes the lever 45 to swing upon its pivot but this movement is interrupted by the pin 65 coming in vcontact `with the upper end of the arm 54 and the dogs 66 and 68 `are thus held out ofengagement with the `toothed disk 38. :The pointer will now remain at the proper point on the dial as long as the person stays upon the weighing platform. When the` person `steps off the platform, the plate 49 is` lifted by the yoke and the dog 56V is `thrown upwardly by its engagement with the teeth 49 thereby forcing the lower end7 of the arm 54 outwardly and the upper portion of the armw54 to swing inwardly, thereby releasingvthe pin 65 and permitting the trip lever to return to its normal position. `The return of the trip lever releases the locking lever 42 and permits the dog 68 to move into engagement with the teeth of the disk 38. holds theydog 66 outvof 'engagement with the teeth of the disk so that the indicatingV mechanism may now return to normal or zero position, but locates this dog in the path vof the stop 67 which lifts the dog 66 asit moves thereby and interlocks therewith to hold the indicating mechanism against movement until another' coin is inserted. `The return movement of the segmental gear 33 and the pinion 34 is produced by the' upward movement ofthe yoke 22 under the action ofthe springs 24. The weight 40 returns the disk 38 and pointer 12.

Assume now that the partsr are in the position shown in Fig. 2 lwith the weight of the coin depositor indicated.

If an attempt is made to obtain the Weight of another person by changing places on the platform, itis practically impossible to maintain a uniform pressure on the weighing platform and an oscillation or reciprocation y of thcplate or ratchet bar 49 to some extent invariably occurs, either as the second person steps on the platform, oras the first person steps 0H. vAs the dog or pawl 56 is at such time engaged with the serrated poi'- tion 49 ofsaid plate, the arm or dog 54 is rocked and the pin 65 released. VThis re, `leases the dogs 66 and 68 and permits them to move into engagement with the teeth of the ratchet `disk 38 and the disk and the indicating mechanism is thereby held against movement inboth directions so that no further indication of weight is possible. until prevents the weighing of more than one per` 1 son for a single coin. This mechanism is simple in construction and in no way interferes with the legitimate use of the weighing scale. y Y y I am aware that numerous changes'may be Vmade in the construction, arrangement, and

mode of operation of the various parts withi out departing from the spirit of my inven-Y tion and I reserve the right tomake all such as fairly fall lowing claims.

I claim as my invention:

` 1. A coin-controlled weighing scale com-y prising weighing mechanism having a platform, indicating mechanism having-the exwithin the scope of the foltent of its initial movement determined by l the Vposition of said weighing mechanism, coin-controlled means Vfor lockingr vsaid mechanism, means for holding said coin controlled locking means in released posi-V tion and actuated by the movement of said" weighing mechanism when the weight has been removed from `the scale or reduced'subsequent to the completion of the initial movement of said indicating means for permitting said coin-controlled locking means to lock said indicating means against further movement in either direction, saidv weighingv mechanism including -j a part adapted to be shifted with a'sliding movement to release said coin-controlled locking meansat the termination of the weighingl operation.

2. In a weighing scale, the combination of a weight actuated member, a dial, a i-otatp able indicator cooperating with saidmem-` ber, locking means for said indicator, means to `release said locking means `to permit movement of said indicator during the weighing oper-ation and operable upon re- ,laXation of the weight on said member to permit said locking means to lock the indicator substantially in the position of indication of the determined weight, and a part movable with the Weight actuated member and serving to release said locking means from the indicator upon. return of the `Weight actuated member tothe normal position.

3. In a weighing scale, the combination of a Weight actuated member, a rotary member cooperating therewith and provided with an indicator for indicating the Weight on said a Weight actuated member, an indicator cooperating therewith and provided with a toothed Wheel, a latch adapted to engage the teeth of said iivheel and lock the latter against movement in both directions, means for releasing said latch means for holding the latch out of engagement with the teeth during the Weighing operation and adapted upon relaxation of Weight on the Weight actuated member to permit/.engagement of the latch With the teethof said Wheel, and a slidablefpart operablewith the weight actuated member andengaging the latch at the termination ofthe returnl movement of said Weight actuated member to disengage the latch from the teeth.

5. In a weighing scale, the combination a dial, a rotatable indicator cooperating therewith and a Weight actuated member for controlling the movement ofthe indicator, both being independently operable, a latch adapted to normally hold the indicator in the Zero position, means for releasing said latch, said latch also being adapted at the conclusion of each Weighing operation to interlock with the indicator and hold same against movement in both directions, a; second latch to hold the indicator from moving forward, and means operable with the Weight aetuated'member for engaging the first latch at the termination of the return'movement of the weight actuated member to releasey the first latch from the indicator. Y

6. In a weighing scale, the combination of Weighing mechanism, indicating mechanism having the extent of its movement determined by the position of the Weighing meehanism, a latch for the indicating mechanism, coin controlled means for releasing said latch, a trip member for engaging said coin indicating mechanism upon change of posi-` tion of the weighing mechanism, and a second coin controlled latch for the indicating mechanism held in released position by said trip member engaging said coin controlled means to permit operation ot' the indicating mechanism, and when disengaged yby the release of the Weight to be determined to hold said indicating mechanism against forward movement to register a greater or additional weight.

7. Ina weighing scale, the combination of a weight actuated member, a coin controlled indicator, means for limiting the number of weight indications for each coin comprising mechanism including a latch and aslidable toothed bar and a pivoted plate having a pawl cooperating with the bar and controlled by vibration of the weight actuated member for locking the indicator at substantially the determined weight until the weight actuated member returns to the normal position and being released by movement thereof, and an additional latch to hold the indicator against forward movement, said last latch being inoperativeduring the weight indicating op eration after insertion of a coin.

8. A coin-controlled weighing scale comprising weighing mechanism having a plat-y form, indicating mechanism Ihaving the extent of its initial movement determined by the position of said weighing mechanism, a coinscontrolled lever for locking said mechanism, means for holding said coin controlled locking means in released position and aetuated by the movement of said weighing mechanism when the Weight has been removed 'from' the scale platform or reduced subsequent to the completion of the initial movementiof said indicating means for permitting said coin-controlled lever to lock said indicating means against further movement in either direction, said weighing mechanism including a part adapted to be shifted `with a sliding movement to release said coin-controlled lever at the termination of the weighing operation.

9. In a weighing scale, a counterbalanced, Weight-actuated member adapted lto be shifted to different positions in accordance With the load thereon, a shiftable indicator adapted to be arrested by said member in different weight indicating positions, a toothed part connected to and shiftable with said indicator, a coin controlled catch `cooperating With said toothed part, a dog for holding said catch disengaged during the Weight indicatingzoperation, a trip for said Sil 4dog adapted to be operated by said Weightactuated member When the Weight has been removed from the scale platform or reduced to effect the engagement of said catch with said toothed part in any of the different positions of said indicator', said catch and toothed part, when engaged, serving to prevent reverse movement and a second Weight indicating operation, and a second catch for the indicator to permit operation thereof When disengaged, and to hold the indicator against forward movement but permit backward movement thereof when engaged with said indicator. y c

l0. In a weighing scale, the vcombination of a Weight actuated member, a rotary member cooperating therewith and provided with an indicator for indicating the Weight on said Weight actuated member, a latch for locking said rotary member, means for releasing said latch from the rotary member during the Weighing operation, means including' said releasing means for holding said latch in released position and adapted to permit said latch to interlock With said rotary member upon relaxation of Weight on the Weight actuatedv member or vibration thereof so as to hold the indicator `substantially in the determined Weight indicating position, and a plate movable with the Weight actuated member and adapted to release the latch at the termination of the return movement of the Weight actuated member.

JOHN B. WATLING. 

